It won't pull an image because the name of your rom is wrong. You've got it spelt with an i, but it should be spelt with a y.
Some game entries in the database will have alternate variations of a game's name, but generally if you don't have correctly named roms, you won't get a database match and therefore you won't get any images.
Whether your roms are compressed or uncompressed would generally make no difference unless the rom name for some reason differs from the compressed name.